First of all, sorry about the difficulty. And don’t worry, we will get all your messages one way or another.
Now, did you change your username on the old site or the new one? Shaun (Snapdragon) set up the “PM repository,” so he’s the authority. But as far as I know, whatever username you were last using on the old site should still work. You have tried (unsuccessfully) to log in to the old site with both your old and new usernames; is that right?